Linus yale



LINUS YALE, JR., OF PHILADELPHIA, PENNSYLVANIA.

LOCK.

Specification of Letters Patent 1 \To. 28,710, dated June 12, 1860.

To all whom it may concern:

Be it known that I, LINUS YALE, J r., of the'city and county ofPhiladelphia, in the StateY of Pennsylvania, have invented a new andImproved' Method of Constructing Locks for Bank Safes, Vaults, &c.; andI do hereby declare the following to be a full and exact description ofthe same, reference being had to the drawings annexed to and making partof this specification.

Figure 1 is a plan view of lock with the cover removed showing theworking part-s.

By lifting the loose leaf of the drawing the tumblers and other parts ofthe lock on a lower plane are shown. Fig. 2 is a vertical section of thesame through the line Z Z, with the co-ver in place and the key insertedin' the key hole. Fig. 3 is a horizontal section of the same through theline Y Y but the key is lnot represented in this section. Fig. 4 is apla-n of the key handle and pod case. Fig. 5 is a sect-ion of the sameshowing the swivel S of the pod case M. Fig. 6 is the. pod of key bitsseparated from its case. Fig. 7 is a part of the draw down platev G,reversed to show talon slot g, and crank pin i of wheel I also the limbg which locks into the notches of the bolt. Fig. 8 is a plan of thatpart of the bolt B which has thev lugs b bf for steadying the secondarytumblers; and also the notches b b for the limb g to engage in to holdit in position while the key hole is open.

The same letters in all the different figures indicate the same parts.

A A is the casek or bar of the lock pierced as usual at the corners forscrews to secure it to the door. It also has a projection a a which isgrooved at E E, more particularly described hereafter and serves as achamber in which the primary tumblers or sliders work, also hereafterdescribed.

B, B, is 'the main bolt of the lock ,which is provided with lugs b Z1 tohold t-he secondary tumblers, and also with the notches b b in its upperedge into which the limb g of the draw down plate G engages, to hold iteither in the locked or unlocked position. This engagement isparticularly shown by dotted lines at g in Fig. 2.

C, C, are the primary or key tumblers against which, on the point-s c c,the key bits act to adjust them to their required position, and soformed as to embrace (while in the unlocked position) the tongues of thesecond* ary tumblers, thereby carrying them intheir movements Ytowhatever position they are made to assume by the key.

D, D, are the secondary tumblers, sometimes called fence tumblers, whichride horizontally with the bolt B, and in the recess of which they movevertically (when the lock is in position on the door of a vault) tocorrespond with the vertical movement of the primary tumblers. They arealso each provided with eight or more notches (1, 2, 3, 4, 5, 6, 7, S)which by hooking on to the fence knife N register the form of the keybits used in locking, since' the notches are cut to correspond to thevaried lengths of the key bits.

E E is a grooved channel in the projection a a of the case, in thewhich, lie the ends of vthe tumblers C, the driver F, (hereinafterdescribed) and is the channel in which moves the key pod inits action onthe tumblers. An enlargement in it forms the chamber for the key wherethe case M (hereinafter described) lies while the driver F displaces theJod. i

l F F is a hardened driver or punch which traverses through the keychamber bymeans .of its attachment to the draw-down plate G (to bedescribed) and by so traversing no-t only takes the pod out of the key,but following the same closes up the passage through whichy it haspushed it, thereby perfectly cutting off all acess to the tumblersthrough the key hole at any time when the bolt B' can be made to move,thus preventing picking by the tentative process.

Gr Gr is a draw-down plate moved vertically by the crank pin z' on thewheel I working in the talon slot gv. This plate answers three purposesrst, it restores by means of its limb g all the tumblers to their normalposition; secondly, itholds the bolt B in position either locked orunlocked by means of the same limb g working into the notches 2) brespectively whenever the key channel is in the least degree open, orwhenever the tumblers can be reached or felt by any tool or instrumentfrom the outside; thirdly, it projects the driver F through and acrossthe key chamber P to displace the key pod of bits.

H is the bolt talo-n plate by means of which the bolt is moved eitherback or forth by the crank pin z'.

I is a gear wheel with a crank pin z', with which it moves verticallythe draw-down plate, and horizontally the bolt talon plate, and throughthat the main bolt B.

K is the key wheel which driven by the key handle in turn drives thegear wheel I, and through it thel draw-down plate G and the bolt B. Thiswheel is pierced through its center with a hole the shape of the key andis also so formed as to maintain its position by means of a hole in thecover which it fits as at 7c, and it may also be provided with a milledhead K or other suitable device by which the lock may be turned insteadof using the key handle.

Figs. 4l and 5, is the key handle perforated for the swivel pin s of thepod M.

M is the pod case attached by a swivel pin s to the handle. This podcase fills the key chamber and remains stationary while the handlerevolves, to move the other works through the means of the key wheel,&c. It is in turn illed with the pod of bits Fig. 6 which it holds inposition while in the lock, ready for the driver F to displace by movingit perpendicularly up through it.

N is a fence knife attached immovably to the case, and on to which th'esecondary tumblers are anchored by means of their notches when the boltB moves forward to its locked position.

O O are brass furring which serve to isolate the sliders or tumblers, sothat they shall not influence each other in moving.

Operation: Insert the key and turn to the right, and the key wheel Kgearing into the wheel I revolves it to the left, and its crank pin z'working into the talon slot of the draw-down plate G elevates it to itsfull height, thereby releasing the bolt, which was until now, held bythe limb g', and also carries the driver F, up through the key pod casethereby pushing the pod of bits out of it, and against the ends c, ofthe primary tumblers C, elevating each of them severally to heights dueto the varied lengths of the key bits and of course the secondary orfence tumblers are carried by the primary or key tumblers to exactly thesame height. Now the crank pin 1l takes into the talon plate of the boltand carries it forward to its locked position where the secondarytumblers are hung on to the knife N by the notches corresponding to theheight at which the key elevates them. The continued movement of thecrank pin now brings it into action on the draw-down plate G which itrestores to its former position, bringing down with it the tumblers C totheir normal position, and also locking into the bolt B by the limb g onthe upper end. The downward movement of the primary tumblers also forcesthe key pod down into the case, when of course the same movementwithdraws the driver F from the pod ease, and releases the key so thatit is easily withdrawn. On reversing the motion after again insertingthe key the wheels rotate in the reverse way and elevate the draw-downplate as before, but take into the bolt talonplate at the opposite sideof the talon, moving the bolt in the-opposite or unlocking direction,after which, the draw-down plate carries down the key tumblers, and byand through them, also the fence or secondary tumblers,.leaving them intheir normal position ready to be acted on by any new form of key whichmay be applied.

Of course the key wheel being so constructed as to project through thedoor may be turned directly by the hand without the key handle; orindeed the gear wheel I may be so arranged as to be turned directly bythe hand rendering thereby the use of the key wheel K entirelyunnecessary; but I prefer using the handle of the key in the waydesignated as more convenient and eX- posing less of the lock on theoutside of the door.

The other parts having been used before by myself and others, I onlyclaim as new and of my invention, and desire to secure by LettersPatent- The pieces M and F when used in the manner or an equivalentmanner and for the purpose substantially as described.

LINUS YALE, JR.

Witnesses JOHN HosKIN, C. O. YALE.

